含中间共振态的三体末态探测效率的研究  

Study on Detection Efficiency of Three-body Final State with Intermediate Resonance

作　　者：高雅 吴臻泓 钟翠 黄麟钦 李小华[1] 张振华[1] 郑波[1] GAO Ya;WU Zhenhong;ZHONG Cui;HUANG Linqin;LI Xiaohua;ZHANG Zhenhua;ZHENG Bo(School of Nuclear Science and Technology,University of South China,Hengyang,Hunan 421001,China)

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2020年第2期16-20,共5页Journal of University of South China：Science and Technology

基　　金：湖南省研究生科研创新项目(CX20190743)。

摘　　要：多体末态过程通常包含的中间共振态直接影响到探测效率的确定。研究了采用二维不变质量谱加权的方法,用于计算多体末态过程的探测效率。对三体末态e+e-→π+π-η过程,考虑了e+e-→π+π-η,e+e-→ρη和e+e-→a±2π三个过程的贡献,并利用二维不变质量谱加权法对该末态模拟数据样本的探测效率进行了估计。与直接加权的结果对比表明该方法能够快速且有效地确定探测效率。The intermediate resonance states in the multi-body final state process affect the detection efficiency directly.A two-dimension invariant mass spectra weight method was developed to calculate the detection efficiency of multi-body final state process.For the three-body final state e+e-→π+π-η,two intermediate processes,e.g.e+e-→ρηand e+e-→a±2πshould be considered.The study calculates the detection efficiency of this final state for the simulated data sample by employing the two-dimension invariant mass spectra weight method.The results are consistent with those from the direct weight method,while this method is more effective and fast.

关 键 词：三体末态 二维不变质量谱加权法 探测效率计算 中间共振态 

分 类 号：O572[理学—粒子物理与原子核物理]